Add cucumber tests for Villains.

No change in expectation made on examples using Uncanny Avengers; need
to add a special "notes" column to deal with Wolverine's Overrun
ability--this will be much easier to do than actually calculating how
many times he can possibly Overrun.

Use Avengers only with the Plot "Crown Thor King of Asgard" because when
they are together is the only time either of them really affects the
speed of the Villain/Adversary Deck.

[GH-15]